ipc/param_traits_read_macros.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef IPC_PARAM_TRAITS_READ_MACROS_H_
   6 #define IPC_PARAM_TRAITS_READ_MACROS_H_
   7 #pragma once
   8
   9 // Null out all the macros that need nulling.
  10 #include "ipc/ipc_message_null_macros.h"
  11
  12 // STRUCT declarations cause corresponding STRUCT_TRAITS declarations to occur.
  13 #undef IPC_STRUCT_BEGIN
  14 #undef IPC_STRUCT_MEMBER
  15 #undef IPC_STRUCT_END
  16 #define IPC_STRUCT_BEGIN(struct_name) IPC_STRUCT_TRAITS_BEGIN(struct_name)
  17 #define IPC_STRUCT_MEMBER(type, name) IPC_STRUCT_TRAITS_MEMBER(name)
  18 #define IPC_STRUCT_END() IPC_STRUCT_TRAITS_END()
  19
  20 // Set up so next include will generate read methods.
  21 #undef IPC_STRUCT_TRAITS_BEGIN
  22 #undef IPC_STRUCT_TRAITS_MEMBER
  23 #undef IPC_STRUCT_TRAITS_PARENT
  24 #undef IPC_STRUCT_TRAITS_END
  25 #define IPC_STRUCT_TRAITS_BEGIN(struct_name) \
  26   bool ParamTraits<struct_name>:: \
  27       Read(const Message* m, void** iter, param_type* p) { \
  28     return
  29 #define IPC_STRUCT_TRAITS_MEMBER(name) ReadParam(m, iter, &p->name) &&
  30 #define IPC_STRUCT_TRAITS_PARENT(type) ParamTraits<type>::Read(m, iter, p) &&
  31 #define IPC_STRUCT_TRAITS_END() 1; }
  32
  33 #undef IPC_ENUM_TRAITS
  34 #define IPC_ENUM_TRAITS(enum_name) \
  35   bool ParamTraits<enum_name>:: \
  36       Read(const Message* m, void** iter, param_type* p) { \
  37     int type; \
  38     if (!m->ReadInt(iter, &type)) \
  39       return false; \
  40     *p = static_cast<param_type>(type); \
  41     return true; \
  42   }
  43
  44 #endif  // IPC_PARAM_TRAITS_READ_MACROS_H_
  45